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SpringBoot服務開啟后通過端口訪問無反應的解決

時間：2020-10-07來源：www.outletmksalestore.com作者：電腦系統城

SpringBoot入門Demo,一次深夜踩坑記錄。

springboot小項目開啟后，訪問端口無反應。

首先看我的項目目錄：

項目的pom文件內容如下：

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80 <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.bes</groupId>
<artifactId>spring-colud</artifactId>
<version>1.0.0-SNAPSHOT</version>
<modules>
<module>user-service</module>
</modules>
<packaging>pom</packaging>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Finchley.SR1</spring-cloud.version>
<mapper.starter.version>2.0.3</mapper.starter.version>
<mysql.version>5.1.32</mysql.version>
<pageHelper.starter.version>1.2.5</pageHelper.starter.version>
</properties>

<dependencyManagement>
<dependencies>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
</dependency>


<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>${mapper.starter.version}</version>
</dependency>


<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>${pageHelper.starter.version}</version>
</dependency>


<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
</dependencyManagement>

<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.4</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

<groupId>com.bes</groupId>
  <artifactId>spring-colud</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <modules>
    <module>user-service</module>
  </modules>
  <packaging>pom</packaging>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.4.RELEASE</version>
  </parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    <mapper.starter.version>2.0.3</mapper.starter.version>
    <mysql.version>5.1.32</mysql.version>
    <pageHelper.starter.version>1.2.5</pageHelper.starter.version>
  </properties>

<dependencyManagement>
    <dependencies>
      
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
      </dependency>

<dependency>
        <groupId>tk.mybatis</groupId>
        <artifactId>mapper-spring-boot-starter</artifactId>
        <version>${mapper.starter.version}</version>
      </dependency>

<dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper-spring-boot-starter</artifactId>
        <version>${pageHelper.starter.version}</version>
      </dependency>

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
      </dependency>
    </dependencies>
  </dependencyManagement>

<dependencies>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.4</version>
    </dependency>
  </dependencies>

<build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

我的application.yml配置為：

server:
port: 8081
spring:
datasource:
url: jdbc:mysql://localhost:3306/springboot
username: root
password: root
mybatis:
type-aliases-package: com.bes.user.domain

UserDao為

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8 package com.bes.user.dao;

import com.bes.user.domain.User;
import org.springframework.stereotype.Repository;
import tk.mybatis.mapper.common.Mapper;

public interface UserDao extends Mapper<User> {
}

UserService為：

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19 package com.bes.user.service;

import com.bes.user.dao.UserDao;
import com.bes.user.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Transactional
public class UserService {
@Autowired
UserDao userDao;

public User findById(Integer id) {
User user = userDao.selectByPrimaryKey(id);
return user;
}
}

UserController為：

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22 package com.bes.user.web;

import com.bes.user.domain.User;
import com.bes.user.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
UserService userService;

@GetMapping("{id}")
public User findById(@PathVariable("id")Integer id) {
User user = userService.findById(id);
return user;
}
}

UserApplication為：

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13 package com.bes;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import tk.mybatis.spring.annotation.MapperScan;

@SpringBootApplication
@MapperScan("com.bes.user.dao")
public class UserApplication {
public static void main(String[] args) {
SpringApplication.run(UserApplication.class, args);
}
}